i only get google analytics data from devices that run android 5.0 lolipop

I only get google analytics data from devices that run android 5.0 lolipop but not for other android devices which do work well with my app.

I'm using android studio. I compiled the app with play services 7.5.0.

com.google.android.gms:play-services:7.5.0

My min-sdk is API 9.

Everything is working fine except that from android versions below 5.0 (lollipop) i don't receive any data in analytics..

Please help me..

via Chebli Mohamed